Cấu hình DNS trên Linux

Cau hinh DNS (Lab_DNS_Docchitiet.pdf)
+ Cai dich vu named (Da cai dat)
+ Kiem tra: rpm -qa bind* (1)
Neu co goi ...chroot... -> duong dan file cau hinh thay doi (2)
+ Cau hinh:
1. file /etc/named.conf ((2) -> /var/named/chroot/etc/named.conf)
Chu y: local thuan (3), local nghich (4), domain thuan, domain nghich
2. File phan giai thuan /var/named/tenfilethuan
(2) -> /var/named/chroot/var/named/tenfilethuan
3. file phan giai nghich /var/named/tenfilenghich
(2) -> /var/named/chroot/var/named/tenfilenghich
+ Restart service named

Chu y :
- Cu phap giong trong file huong dan
- Day du file thuan, nghich cho tung domain
- Duong dan
- (3), (4) da co trong file named.rfc1912... va duoc include trong file /etc/named.confg


domain thuan: /var/named/t3h.com.hosts
@       IN SOA dnsserver.t3h.com. root.t3h.com. (
2001112800;
10800;
1800;
36000;
86400 )
IN      NS      dnsserver.t3h.com.
IN      MX      0 mail server.t3h.com.
dnsserver       IN      A       192.168.2.14
server          IN      A       192.168.2.1
mailserver      IN      A       192.168.2.2
www             IN      CNAME   server.t3h.com.


domain nghich: /var/named/t3h.com.localhost
@       IN      SOA     dnsserver.t3h.com. root.t3h.com. (
2001112800;
10800;
1800;
3600000;
86400 )
IN      NS      dnsserver.t3h.com.
IN      MX      0 mailserver.t3h.com.
2       IN      PTR     dnsserver.t3h.com.
1       IN      PTR     server.t3h.com.


///// /var/named/chroot/etc/named.conf

options {
        listen-on port 53 { 127.0.0.1; };
        listen-on-v6 port 53 { ::1; };
        directory       "/var/named";
        forwarders {192.168.2.14;}
        dump-file       "/var/named/data/cache_dump.db";
        statistics-file "/var/named/data/named_stats.txt";
        memstatistics-file "/var/named/data/named_mem_stats.txt";
        allow-query     { localhost; };
        recursion yes;
};

logging {
        channel default_debug {
                file "data/named.run";
                severity dynamic;
        };
};

zone "." IN {
        type hint;
        file "named.ca";
};
//Khai bao zone thuan t3h.com
zone "t3h.com" {
        type master;
        file "t3h.com.hosts";
        allow-query{any;};
};

//Khai bao zone nghich t3h.com
zone "t3h.com" {
        type master;
        file "t3h.com.localhost";
        allow-query{any;};
};

include "/etc/named.rfc1912.zones";